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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> /�y-;alytica1 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 woo <br /> Cambria Client Prod ID Shell Manteca Sampled 03/25/98 <br /> 1144 65th St Suite C Sample Descrlpt MW-1, 15 5-16 5 Received 03/26/98 <br /> Oakland, CA 94608 Matrix SOLID Extracted 04/01/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/01/98 <br /> Attention Paul Waite Lab Number 9803J57-03 Reported 04J09/98 <br /> QC Batch Number GC040198BTEXEXA <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 1.0 .. 14 <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 0 016 <br /> Xylenes (Total) 00050 0 053 <br /> Chromatogram Pattern >C10 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 95 <br /> 4-Bromofluorobenzene 60 140 128 <br /> s <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> CDC <br /> JrdNHerling <br /> Project Manager Page 8 <br />